During transcription in eukaryotes RNA polymerase 2 synthesises

a) Precursors of tRNA and snRNA

b) Precursors of mRNA, snRNA and microRNA

c) Precursors of rRNA

d) All of the above

Answer: b) Precursors of mRNA, snRNA and microRNA

Explanation: Transcription in eukaryotes requires three polymerases and sets of transcription factors, unlike prokaryotes which requires a single RNA polymerase.

RNA polymerase 2 synthesises the nuclear pre-mRNAs, snRNA and microRNA.

RNA polymerase 1 synthesises the ribosomal RNAs, and polymerase 3 is responsible for the synthesis of tRNAs.

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